<template>
<div class="login_container">
	<div class="login_box">
		<!-- 头像区 -->
		<div class="avatar_box">
			<img src="../assets/logo.png" alt="">
		</div>
		<!-- 登录表单区域 -->
		<el-form ref="loginFormRef" :model="loginForm" :rules="loginFormRules" class="login-form">
			<!-- 用户名 -->
			<el-form-item prop="username">
		    	<el-input v-model="loginForm.username">
		    		<i slot="prefix" class="iconfont iconaccount"></i>
		    	</el-input>
		  	</el-form-item>
		  	<!-- 密码 -->
		  	<el-form-item prop="password">
		    	<el-input type="password" v-model="loginForm.password">
		    		<i slot="prefix" class="iconfont iconmima"></i>
		    	</el-input>
		  	</el-form-item>
		  	<!-- 按钮区 -->
		  	<el-form-item class="btns">
		    	<el-button type="primary" @click="login">登录</el-button>
		    	<el-button type="info" @click="resetLoginForm">重置</el-button>
		  	</el-form-item>
	  	</el-form>
	</div>
</div>
</template>
<script>
	
	export default{
		data(){
			return {
				//登录表单的数据对象
				loginForm:{
					username:'admin',
					password:'123456'
				},
				//表单验证规则对象
				loginFormRules:{
					//验证用户名是否合法
					username:[
						{ required: true, message: '请输入用户名', trigger: 'blur' },
            			{ min: 3, max: 10, message: '用户名长度在 3 到 10 个字符之间', trigger: 'blur' }
					],
					//验证密码是否合法
					password:[
						{ required: true, message: '请输入密码', trigger: 'blur' },
            			{ min: 6, max: 15, message: '密码长度在 6 到 15 个字符之间', trigger: 'blur' }
					]
				}
			}
		},
		methods:{
			//点击重置按钮，重置表单
			resetLoginForm(){
				this.$refs.loginFormRef.resetFields();
				//this.$refs.loginFormRef.clearValidate();
			},
			login(){
				this.$refs.loginFormRef.validate(async valid=>{
					if (!valid) return;

					//await只能用在被async修饰的函数中
					const {data:res} = await this.$http.post('login',this.loginForm);

					if (res.meta.status !== 200) {
						return this.$message.error('登录失败');
					}else{
						this.$message.success("登录成功");
						//将登录之后的token,保存到客户端的sessionStorage中
						//项目中除了登录之外的其他api接口，必须在登录之后才能访问
						//token只能在当前网站打开期间生效，所以讲token保存在sessionStorage中
				
						window.sessionStorage.setItem("token",res.data.token);
						//通过编程式导航跳转到后台主页，路由地址式/home
						this.$router.push('/home');
					}	
					
				});
			}

		}

	}
</script>
<style lang="less" scoped>
.login_container{
	background: #3283AC url(../assets/admin-login-bg.jpg) no-repeat center;
	height:100%;
}
.login_box{
	width:450px;
	height:300px;
	background-color:#fff;

	background_radius:3px;
	position:absolute;
	left:50%;
	top:50%;
	transform:translate(-50%,-50%);
	
	.avatar_box{
		height: 130px;
		width: 130px;
		border: 1px solid #eee;
		border-radius: 50%;
		padding:10px;
		box-shadow:0 0 10px #ddd;
		position:absolute;
		left:50%;	
		transform:translate(-50%,-50%);
		background-color:#fff;
		img{
			height: 100%;
			width: 100%;
			border-radius: 50%;
			background-color:#eee;
		}
	}

}

.btns{
	display:flex;
	justify-content:flex-end;
}
.login-form{
	position:absolute;
	bottom:0;
	width:100%;
	padding:0 20px;
	box-sizing:border-box;
}
.iconfont{
	font-size:17px;
}
	
</style>